This is a discussion on 04 auto WRX 1/4 mile problem within the Comparison: WRX vs World forums, part of the Community - Meet other Enthusiasts category; I brake launched my 04 4EAT (automatic) wrx at 2500rpm with a reaction time of 0.06 seconds and i am ...

04 auto WRX 1/4 mile problem

I brake launched my 04 4EAT (automatic) wrx at 2500rpm with a reaction time of 0.06 seconds and i am still getting constant 16.8s times. WTF???
i dont know what can be going wrong.
i have an HKS uppipe and performance muffler installed with a tranny cooler, i dont see why my quarter mile times are so slow. any help would be GREATLY appreiated.
from what i hear, the stock auto wrx's should be running mid 15's to high 14s times.

check engine light came on shortly after the races, the code that came up said that my front o2 sensor was messed up, could that cause any loss in power? and i have never checked any of the plugs on this car as i only got it a month ago, could sh*tty plugs be causing anything?

Wow it's like night and day between the threads you've posted. In the other one you had zero clue about what you even owned. If you're popping an 02 code replace the sensor. If it's bad you'll be running pretty damn rich. I'm surprised you haven't noticed really bad gas mileage. Fix that problem then see how it does.

yeah i just got the car a month ago so im really not 100% sure what i should be feeling/expecting but im dam sure 16.8 is slow as hell...
and im getting the new o2 sensor tomorrow and i plan on changing the plugs very shortly after. ill post what happens

The great thing about Subarus is nothing should be a surprise. Buy a logger cable, get the free logging software, and your car will tell you exactly what is wrong. Actually you don't even need full logging software; the Learning View software will give you a snapshot that will probably point out the problem in a single screen.

If your car is that slow then you need to get it looked at before real damage takes place. My quad cab 4x4 truck dips into the 15s

i am going to change the spark plugs and cross my fingers for it to be something as simple as that, if not, guess i have to take it into the subaru dealership and ask em to troubleshoot. thanks for all the help guys, really appretiate it.

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